package com.heima.article.service.impl;

import java.util.Date;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.injector.methods.SelectById;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.article.mapper.ApArticleConfigMapper;
import com.heima.article.mapper.ApArticleContentMapper;
import com.heima.article.mapper.ApArticleMapper;
import com.heima.article.service.ApArticleService;
import com.heima.article.service.ArticleFreemarkerService;
import com.heima.common.constants.ArticleConstants;
import com.heima.common.constants.BehaviorConstants;
import com.heima.common.redis.CacheService;
import com.heima.model.article.dtos.ArticleCommonDto;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.article.dtos.ArticleHomeDto;

import com.heima.model.article.dtos.ArticleInfoDto;
import com.heima.model.article.pojos.ApArticle;
import com.heima.model.article.pojos.ApArticleConfig;
import com.heima.model.article.pojos.ApArticleContent;
import com.heima.model.article.vos.ApArticleVo;
import com.heima.model.article.vos.HotArticleVo;
import com.heima.model.comment.dtos.ALLCommentListDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.mess.ArticleVisitStreamMess;
import com.heima.model.user.pojos.ApUser;
import com.heima.utils.thread.AppThreadLocalUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.*;
import java.util.stream.Collectors;

import static com.heima.common.constants.ArticleConstants.DEFAULT_TAG;
import static com.heima.common.constants.ArticleConstants.HOT_ARTICLE_FIRST_PAGE;


@Service
@Transactional
@Slf4j
public class ApArticleServiceImpl extends ServiceImpl<ApArticleMapper, ApArticle> implements ApArticleService {

    // 单页最大加载的数字
    private final static short MAX_PAGE_SIZE = 50;

    @Autowired
    private ApArticleMapper apArticleMapper;

    @Autowired
    CacheService cacheService;

    @Autowired
    ApArticleConfigMapper apArticleConfigMapper;

    /**
     * 根据参数加载文章列表
     *
     * @param loadtype 1为加载更多  2为加载最新
     * @param dto
     * @return
     */
    @Override
    public ResponseResult load(Short loadtype, ArticleHomeDto dto) {
        //1.校验参数
        Integer size = dto.getSize();
        if (size == null || size == 0) {
            size = 10;
        }
        size = Math.min(size, MAX_PAGE_SIZE);
        dto.setSize(size);

        //类型参数检验
        if (!loadtype.equals(ArticleConstants.LOADTYPE_LOAD_MORE) && !loadtype.equals(ArticleConstants.LOADTYPE_LOAD_NEW)) {
            loadtype = ArticleConstants.LOADTYPE_LOAD_MORE;
        }
        //文章频道校验
        if (StringUtils.isEmpty(dto.getTag())) {
            dto.setTag(ArticleConstants.DEFAULT_TAG);
        }

        //时间校验
        if (dto.getMaxBehotTime() == null) dto.setMaxBehotTime(new Date());
        if (dto.getMinBehotTime() == null) dto.setMinBehotTime(new Date());
        //2.查询数据
        List<ApArticle> apArticles = apArticleMapper.loadArticleList(dto, loadtype);

        //3.结果封装
        ResponseResult responseResult = ResponseResult.okResult(apArticles);
        return responseResult;
    }

    @Override
    public ResponseResult load2(ArticleHomeDto dto, Short type, boolean firstPage) {
        if (firstPage) {
            String json = cacheService.get(HOT_ARTICLE_FIRST_PAGE + dto.getTag());
            if (StringUtils.isNoneBlank(json)) {
                List<HotArticleVo> hotArticleVos = JSON.parseArray(json, HotArticleVo.class);
                ResponseResult responseResult = ResponseResult.okResult(hotArticleVos);
                return responseResult;
            }
        }
        return load(type, dto);
    }

    @Autowired
    private ApArticleContentMapper apArticleContentMapper;

    @Autowired
    private ArticleFreemarkerService articleFreemarkerService;

    /**
     * 保存app端相关文章
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult saveArticle(ArticleDto dto) {
        //1.检查参数
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        ApArticle apArticle = new ApArticle();
        BeanUtils.copyProperties(dto, apArticle);

        //2.判断是否存在id
        if (dto.getId() == null) {
            //2.1 不存在id  保存  文章  文章配置  文章内容

            //保存文章
            save(apArticle);

            //保存配置
            ApArticleConfig apArticleConfig = new ApArticleConfig(apArticle.getId());
            apArticleConfigMapper.insert(apArticleConfig);

            //保存 文章内容
            ApArticleContent apArticleContent = new ApArticleContent();
            apArticleContent.setArticleId(apArticle.getId());
            apArticleContent.setContent(dto.getContent());
            apArticleContentMapper.insert(apArticleContent);

        } else {
            //2.2 存在id   修改  文章  文章内容

            //修改  文章
            updateById(apArticle);

            //修改文章内容
            ApArticleContent apArticleContent = apArticleContentMapper.selectOne(Wrappers.<ApArticleContent>lambdaQuery().eq(ApArticleContent::getArticleId, dto.getId()));
            apArticleContent.setContent(dto.getContent());
            apArticleContentMapper.updateById(apArticleContent);
        }

        //异步调用 生成静态文件上传到minio中
        articleFreemarkerService.buildArticleToMinIO(apArticle, dto.getContent());


        //3.结果返回  文章的id
        return ResponseResult.okResult(apArticle.getId());
    }


    @Override
    public ResponseResult loadArticleBehavior(ArticleInfoDto dto) {

        //0.检查参数
        if (dto == null || dto.getArticleId() == null || dto.getAuthorId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //{ "isfollow": true, "islike": true,"isunlike": false,"iscollection": true }
        boolean isfollow = false, islike = false, isunlike = false, iscollection = false;

        ApUser user = AppThreadLocalUtil.getUser();
        if (user != null) {
            //喜欢行为
            String likeBehaviorJson = (String) cacheService.hGet(BehaviorConstants.LIKE_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString());
            if (StringUtils.isNotBlank(likeBehaviorJson)) {
                islike = true;
            }
            //不喜欢的行为
            String unLikeBehaviorJson = (String) cacheService.hGet(BehaviorConstants.UN_LIKE_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString());
            if (StringUtils.isNotBlank(unLikeBehaviorJson)) {
                isunlike = true;
            }
            //是否收藏
            String collctionJson = (String) cacheService.hGet(BehaviorConstants.COLLECTION_BEHAVIOR + user.getId(), dto.getArticleId().toString());
            if (StringUtils.isNotBlank(collctionJson)) {
                iscollection = true;
            }

            //是否关注
            Double score = cacheService.zScore(BehaviorConstants.APUSER_FOLLOW_RELATION + user.getId(), dto.getAuthorId().toString());
            System.out.println(score);
            if (score != null) {
                isfollow = true;
            }

        }

        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("isfollow", isfollow);
        resultMap.put("islike", islike);
        resultMap.put("isunlike", isunlike);
        resultMap.put("iscollection", iscollection);

        return ResponseResult.okResult(resultMap);
    }

    @Override
    public ResponseResult updateLikes(Long id) {
        ApArticle apArticle = getById(id);
        if (apArticle == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST);
        }
        apArticle.setLikes(apArticle.getLikes() + 1);
        if (updateById(apArticle)) {
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }
        return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
    }

    @Override
    public ResponseResult updateViews(Long id) {
        ApArticle apArticle = getById(id);
        if (apArticle == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST);
        }
        apArticle.setViews(apArticle.getViews() + 1);
        if (updateById(apArticle)) {
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }
        return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
    }

    @Override
    public void updateScore(ArticleVisitStreamMess mess) {
        //1.更新文章点赞、收藏、评论的数量
        ApArticle apArticle = updateArticle(mess);
        //2.计算文章的分值
        Integer score = computeScore(apArticle);
        score *= 3;
        //3.替换当前文章对应频道的热点数据
        replaceDataToRedis(apArticle, score, HOT_ARTICLE_FIRST_PAGE + apArticle.getChannelId());
        //4.替换推荐对应的热点数据
        replaceDataToRedis(apArticle, score, HOT_ARTICLE_FIRST_PAGE + DEFAULT_TAG);
    }

    @Override
    public ResponseResult findNewsComments(ALLCommentListDto dto) {
        //1.校验参数
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        List<ApArticleVo> apArticleVos = new ArrayList<>();
        for (ApArticle apArticle : list()) {
            ApArticleConfig apArticleConfig = apArticleConfigMapper.selectOne(Wrappers.<ApArticleConfig>lambdaQuery().eq(ApArticleConfig::getArticleId, apArticle.getId()));
            ApArticleVo apArticleVo = new ApArticleVo();
            apArticleVo.setId(apArticle.getId().toString());
            apArticleVo.setTitle(apArticle.getTitle());
            apArticleVo.setComments(apArticle.getComment());
            apArticleVo.setIsComment(apArticleConfig.getIsComment());
            apArticleVo.setCreatedTime(apArticle.getCreatedTime());

            apArticleVos.add(apArticleVo);
        }
        return ResponseResult.okResult(apArticleVos);
    }

    @Override
    public ResponseResult updateCommentStatus(ArticleCommonDto dto) {
        if (dto == null || dto.getArticleId() == null || dto.getOperation() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        ApArticleConfig apArticleConfig = apArticleConfigMapper.selectOne(Wrappers.<ApArticleConfig>lambdaQuery().eq(ApArticleConfig::getArticleId, dto.getArticleId()));
        if (dto.getOperation() == 0) {
            apArticleConfig.setIsComment(false);
        } else {
            apArticleConfig.setIsComment(true);
        }
        apArticleConfigMapper.updateById(apArticleConfig);

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    private void replaceDataToRedis(ApArticle apArticle, Integer score, String s) {
        String articleListStr = cacheService.get(s);
        if (StringUtils.isNotBlank(articleListStr)) {
            List<HotArticleVo> hotArticleVoList = JSON.parseArray(articleListStr, HotArticleVo.class);

            boolean flag = true;

            //如果缓存中存在该文章，只更新分值
            for (HotArticleVo hotArticleVo : hotArticleVoList) {
                if (hotArticleVo.getId().equals(apArticle.getId())) {
                    hotArticleVo.setScore(score);
                    flag = false;
                    break;
                }
            }

            //如果缓存中不存在，查询缓存中分值最小的一条数据，进行分值的比较，如果当前文章的分值大于缓存中的数据，就替换
            if (flag) {
                if (hotArticleVoList.size() >= 30) {
                    hotArticleVoList = hotArticleVoList.stream().sorted(Comparator.comparing(HotArticleVo::getScore).reversed()).collect(Collectors.toList());
                    HotArticleVo lastHot = hotArticleVoList.get(hotArticleVoList.size() - 1);
                    if (lastHot.getScore() < score) {
                        hotArticleVoList.remove(lastHot);
                        HotArticleVo hot = new HotArticleVo();
                        BeanUtils.copyProperties(apArticle, hot);
                        hot.setScore(score);
                        hotArticleVoList.add(hot);
                    }


                } else {
                    HotArticleVo hot = new HotArticleVo();
                    BeanUtils.copyProperties(apArticle, hot);
                    hot.setScore(score);
                    hotArticleVoList.add(hot);
                }
            }
            //缓存到redis
            hotArticleVoList = hotArticleVoList.stream().sorted(Comparator.comparing(HotArticleVo::getScore).reversed()).collect(Collectors.toList());
            cacheService.set(s, JSON.toJSONString(hotArticleVoList));

        }
    }

    private Integer computeScore(ApArticle apArticle) {
        Integer score = 0;
        if (apArticle.getLikes() != null) {
            score += apArticle.getLikes() * ArticleConstants.HOT_ARTICLE_LIKE_WEIGHT;
        }
        if (apArticle.getViews() != null) {
            score += apArticle.getViews();
        }
        if (apArticle.getComment() != null) {
            score += apArticle.getComment() * ArticleConstants.HOT_ARTICLE_COMMENT_WEIGHT;
        }
        if (apArticle.getCollection() != null) {
            score += apArticle.getCollection() * ArticleConstants.HOT_ARTICLE_COLLECTION_WEIGHT;
        }

        return score;
    }

    private ApArticle updateArticle(ArticleVisitStreamMess mess) {
        ApArticle apArticle = getById(mess.getArticleId());
        apArticle.setCollection(apArticle.getCollection() == null ? 0 : apArticle.getCollection() + mess.getCollect());
        apArticle.setComment(apArticle.getComment() == null ? 0 : apArticle.getComment() + mess.getComment());
        apArticle.setLikes(apArticle.getLikes() == null ? 0 : apArticle.getLikes() + mess.getLike());
        apArticle.setViews(apArticle.getViews() == null ? 0 : apArticle.getViews() + mess.getView());
        updateById(apArticle);
        return apArticle;
    }

}